function wnd_open_param(url, name, cx, cy, cw, ch, param, ff)
{ 
    var wnd = window.open(url,name,"width=" + cw + ",height=" + ch + ",top=" + cy + ",left=" + cx + (param != "" ? "," + param : ""));
    if (ff !== false && wnd) wnd.focus();
    return wnd;
}

function wnd_open_param_center(url, name, cw, ch, param, ff)
{ 
    var sw = 800, sh = 600;

	if (screen.availWidth && screen.availHeight) { //if (document.all || document.layers)
       sw = screen.availWidth;
       sh = screen.availHeight;
    }
	var cx = (sw - cw) / 2, cy = (sh - ch) / 2;
    return wnd_open_param(url, name, cx, cy, cw, ch, param, ff);
}

function wnd_open(url, name, cx, cy, cw, ch, ff) { return wnd_open_param(url, name, cx, cy, cw, ch, "resizable=no,toolbar=no,location=no,status=no,menubar=no,directories=no,scrollbars=no", ff); }
function wnd_open_center(url, name, cw, ch, ff) { return wnd_open_param_center(url, name, cw, ch, "resizable=no,toolbar=no,location=no,status=no,menubar=no,directories=no,scrollbars=no", ff); }
function wnd_wopen_status(url, name, cx, cy, cw, ch, ff) { return wnd_open_param(url, name, cx, cy, cw, ch, "resizable=no,toolbar=no,location=no,status=yes,menubar=no,directories=no,scrollbars=no", ff); }
function wnd_open_status_center(url, name, cw, ch, ff) { return wnd_open_param_center(url, name, cw, ch, "resizable=no,toolbar=no,location=no,status=yes,menubar=no,directories=no,scrollbars=no", ff); }
function wnd_wopen_scroll(url, name, cx, cy, cw, ch, ff) { return wnd_open_param(url, name, cx, cy, cw, ch, "resizable=no,toolbar=no,location=no,status=no,menubar=no,directories=no,scrollbars=yes", ff); }
function wnd_open_scroll_center(url, name, cw, ch, ff) { return wnd_open_param_center(url, name, cw, ch, "resizable=no,toolbar=no,location=no,status=no,menubar=no,directories=no,scrollbars=yes", ff); }